Coevolution:
The change of two or more species in close association with each other.
-Modern Biology Textbook

It can be:
  • as microscopic as correlated mutations between amino acids in a protein.
  • as macroscopic as covarying traits between different species in an environment.
The concept of coevolution was briefly described by Charles Darwin in his book "On the Origin of Species".
-wikipedia.com

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Convergent Evolution:
Organisms that appear to be very similar such as a shark and a porpoise, but are not closely related at all.
-Modern Biology Textbook

Homoplasy - similarity in species of different ancestry which is the result of convergent evolution.
-wikipedia.com

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Divergent Evolution:
Two or more related populations or species become more and more different.

Here are examples of animals that have differentiated through time:
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Merinda Lawrence & Lindsay Howard